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LoongArch: KVM: Deliver interrupt after IN_GUEST_MODE is set

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Interrupt delivery should be called after IN_GUEST_MODE is set. Other
threads may be posting interrupt however does not send IPI to the vCPU,
since the vCPU is not in IN_GUEST_MODE yet.

Here move function call with kvm_deliver_intr() after IN_GUEST_MODE is
set, and set mode with OUTSIDE_GUEST_MODE with atomic method.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Bibo Mao 2026-06-11 20:46:43 +08:00 committed by Huacai Chen
parent 4298588361
commit 8c5cd2b9d6
1 changed files with 2 additions and 2 deletions
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4
arch/loongarch/kvm/vcpu.c
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@ -299,10 +299,10 @@ static int kvm_pre_enter_guest(struct kvm_vcpu *vcpu)
* check vmid before vcpu enter guest
*/
local_irq_disable();
kvm_deliver_intr(vcpu);
kvm_deliver_exception(vcpu);
/* Make sure the vcpu mode has been written */
smp_store_mb(vcpu->mode, IN_GUEST_MODE);
kvm_deliver_intr(vcpu);
kvm_check_vpid(vcpu);
/*
@ -339,7 +339,7 @@ static int kvm_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
u32 intr = estat & CSR_ESTAT_IS;
u32 ecode = (estat & CSR_ESTAT_EXC) >> CSR_ESTAT_EXC_SHIFT;
vcpu->mode = OUTSIDE_GUEST_MODE;
smp_store_mb(vcpu->mode, OUTSIDE_GUEST_MODE);
/* Set a default exit reason */
run->exit_reason = KVM_EXIT_UNKNOWN;